[1] Southern Hlth NHS Fdn Trust, Southampton, Hants, England
[2] Univ York, Dept Hlth Sci, York, N Yorkshire, England
[3] Univ Manchester, Div Psychol & Mental Hlth, Manchester, Lancs, England
[4] Queens Univ, Dept Psychiat, Kingston, ON, Canada
[5] Univ Waterloo, Fac Appl Hlth Sci, Sch Publ Hlth & Hlth Syst, Waterloo, ON, Canada